How do I get keyboard scancodes and know it's an extended key?

[onidarbe]

How or with what API can I know which key is an extended key to be able to use keybd_event with the correct dwFlags?

If I only know how to make a listing like JackTripper did on following link, then I would know that every key starting with a scancode of E0 arebe extended keys.
http://msdn.microsoft.com/en-us/library/windows/desktop/ms646304.aspx
...
N 31
M 32
< , 33
> . 34
? / 35
R SHIFT 36
L CTRL 1D
L ALT 38
Space Bar 39
R ALT E0 38
R CTRL E0 1D
Insert E0 52
Delete E0 53
L Arrow E0 4B
Home E0 47
End E0 4F
Up Arrow E0 48
Dn Arrow E0 50
Page Up E0 49
...